Last month, the New York City Board of Health passed a regulation requiring consent from parents before an infant can undergo a circumcision involving a ritual known as “metzitzah b’peh” in which the person performing the procedure use his mouth to remove blood from the incision wound.

The regulation, which is due to take effect on Oct. 21, would most impact mohelim in the ultra-Orthodox Jewish community where the practice is most prevalent. It requires them to receive from parents signed written consent forms warning that the procedure “exposes the infant to risk of transmission of herpes simplex virus infection and other infectious diseases.”